Physical Science Content Standard B: As a result of their activities in grades 9-12 all students should develop and understanding of Structure and properties of Matter.
Context of Lesson:
This is the first lesson in an introductory unit on the structure and properties of matter. During this class I will be introducing students to pure substances, elements, compounds, mixtures, solutions, suspensions and colloids. Before getting into that, to introduce students to the main idea of the unit, I will be showing a brief video clip from a popular television show, depicting forensic scientists using what they know about properties of matter to solve a crime. The overall goal of this unit is for students to learn how the chemical and physical properties of matter can be used when identifying unknowns and this clip will not only get students interested in the unit, but it will help students make the connection to why we are learning about properties of matter. A brief overview will be given, students will be shown how each of the different types of matter are identified and I will explain how they will go about the room after I assign partners. Students will than identify some samples of pure substances, compounds, mixtures(solutions, suspensions, and colloids) and elements from examining samples that have been prepared for them. Students will also participate in a full class discussion using their observations of these samples.
Opportunities to Learn:
Depth of Knowledge: Level 2 and Level 3
Prerequisite Knowledge:Students will need to be aware of normal lab safety, students will need to have knowledge of how to make observations and record data. Being the first lesson of this unit, students do not need to have much content focused prior knowledge in this area.
Plans for Differentiating Instruction:Students will be grouped in assigned pairs. I will assign partners based on which students behave more productively and appropriately when together.
Accommodations and modifications:As an accommodation to students in my class who are struggling, they will be assigned to a partner who is not struggling and may help them stay more on task and focused during the class period.
Environmental factors:This lesson will require the use of 8 lab benches, which will be set up as stations. A projector and a computer will also be necessary for part of the class.
Materials:
Teacher:
Pool testing kits
salt
water
distilled water
hot plates
silicone
coins
metric rulers
funnel
filter paper
cooking oil
sand
sugar
rubbing alcohol
Video clip from NCIS episode of the Smoking Gun (DVD)
Students:
Pen/Pencil
Science Binder with Note paper
Objectives:
Students will be making observations and differentiating between pure substances, elements, compounds, mixtures(suspensions, solutions and colloids).
Students will separate mixtures from pure substances using physical properties.
Students will relate a NCIS clip to what we will be doing in the final investigation of the unit.
Instruction:
Opening:
Before students get in the classroom, I will have written the plan for the day on the board, and also what it will be leading to in the coming classes, so students know where we are going with the unit. Everything to be accomplished this period will be written in Green (students are already accustomed to this from previous units). On the Board:
Students were also asked to bring in labels from discarded containers of the pure substances and mixtures on their lists of examples, when possible.)
Ask students to share their answers/labels with the class
Ask students of these items, what would scientists consider pure substances?
Ask how do scientists determine when a substance is pure?
Breif PowerPoint
Begin Investigation with Mixtures & Pure substances
Chemical Properties/Changes
Crime Scene Lab
Engagement:
1. Go over homework and ask students to share and discuss their answers to the homework questions. Ask them to refer to the information on the labels they brought in. I will be recording their answers on the board in a table like the one students used for homework and have the class add everything that goes on the board. Ask questions about their answers, and eventually get into how scientists classify pure substances and mixtures leading into the PowerPoint.
2. After going over the agenda, I will briefly use a PowerPoint to lecture on what matter actually is, what possible forms substances can be found as. Students will be given a graphic organizer to use during the class, it will provide them with a way to take effective notes during the lecture, and will also have boxes left for an example of each type of matter explained during class.
Slides will cover:
Pure substances
Elements
Proper Symbols and why we use them
Definition
Compounds
Mixtures
heterogeneous
homogeneous
Solutions, Suspensions, Colloids
Seperating Materials/Substances
3. I will begin to demonstrate how to do the Investigation that students will be starting next class:
a. Separation of liquids: Use a separation funnel to separate two immiscible liquids
( cooking oil and water).
b. Filtration: Use filter paper to separate a mixture (sand and salt).
c. Evaporation and re-crystallization: Use a watch glass to evaporate the water from a
drop or two of a solution (sugar and water). Use a hot plate.
d. Liquid density determination: Use hydrometers to measure the densities of five
solutions (distilled water, two different concentrations of salt solutions, rubbing alcohol and
cooking oil).
e. Solid density determination: Measure the mass and volume of two different coins and calculate the densities.
f. Conductivity: test water for purity using swimming pool testers.
g. Conductivity of semiconductors: test the conductivity of silicon lumps and silicon used in computer chips.
Closure:
As class comes to a close I will remind students of what was covered during class, particularly emphasizing how the properties of substances relates to identifying substances, and asking students how this might tie in to the NCIS clip we watched at the beginning of class.
Students will do the investigation next class.
Assessment:
Students will be observed and asked questions for understanding throughout the lesson, as a form of formative informal assessment, particularly during the homework discussion. They will also be assessed formally through the homework, which will be collected. This will be graded for accuracy and completion because students were given the opportunity to obtain the correct information during class discussion. In addition notes will be checked for completion during binder checks(twice quarterly).
State Standards: GLEs/GSEs
PS1
National Standards:
Physical Science Content Standard B: As a result of their activities in grades 9-12 all students should develop and understanding of Structure and properties of Matter.Context of Lesson:
This is the first lesson in an introductory unit on the structure and properties of matter. During this class I will be introducing students to pure substances, elements, compounds, mixtures, solutions, suspensions and colloids. Before getting into that, to introduce students to the main idea of the unit, I will be showing a brief video clip from a popular television show, depicting forensic scientists using what they know about properties of matter to solve a crime. The overall goal of this unit is for students to learn how the chemical and physical properties of matter can be used when identifying unknowns and this clip will not only get students interested in the unit, but it will help students make the connection to why we are learning about properties of matter. A brief overview will be given, students will be shown how each of the different types of matter are identified and I will explain how they will go about the room after I assign partners. Students will than identify some samples of pure substances, compounds, mixtures(solutions, suspensions, and colloids) and elements from examining samples that have been prepared for them. Students will also participate in a full class discussion using their observations of these samples.
Opportunities to Learn:
Materials:
Objectives:
Students will be making observations and differentiating between pure substances, elements, compounds, mixtures(suspensions, solutions and colloids).
Students will separate mixtures from pure substances using physical properties.
Instruction:
Slides will cover:
( cooking oil and water).
drop or two of a solution (sugar and water). Use a hot plate.
solutions (distilled water, two different concentrations of salt solutions, rubbing alcohol and
cooking oil).
Assessment:
Students will be observed and asked questions for understanding throughout the lesson, as a form of formative informal assessment, particularly during the homework discussion. They will also be assessed formally through the homework, which will be collected. This will be graded for accuracy and completion because students were given the opportunity to obtain the correct information during class discussion. In addition notes will be checked for completion during binder checks(twice quarterly).Reflections
(only done after lesson is enacted)Student Work Sample 1 – Approaching Proficiency:
Student Work Sample 2 – Proficient:
Student Work Sample 3 – Exceeds Proficiency:
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